Unable to View My Account in Apple Music App on Laptop

I have bought a new laptop and downloaded apple music app to access previous purchases. When I go to authorise the computer it says I already have 5 and I need to de-authorise one. However when I go to View My Account to do this I get a message saying This information does not exist or is not available. How can I deauthorise the computers if I cannot access it?

Thanks

Clare